[gnome-shell] Allow testing GDM login dialog from the session

[Giovanni Campagna <gcampagna src gnome org>]

commit e249218a9db7f89240b4011e148f858a5c5c3072
Author: Giovanni Campagna <gcampagna src gnome org>
Date:   Tue Aug 7 17:52:24 2012 +0200

    Allow testing GDM login dialog from the session
    
    Check an environment variable, GDM_GREETER_TEST. If 1, LoginDialog will
    skip anything that fails outside a GDM session.
    It is therefore possible to test the GDM greeter without installing it
    system-wide, by attempting login as the already logged in user (uses the
    same code path as the unlock dialog).
    
    https://bugzilla.gnome.org/show_bug.cgi?id=683725

 js/gdm/loginDialog.js |   16 +++++++++-------
 1 files changed, 9 insertions(+), 7 deletions(-)
---
diff --git a/js/gdm/loginDialog.js b/js/gdm/loginDialog.js
index 7ea93ba..15308dd 100644
--- a/js/gdm/loginDialog.js
+++ b/js/gdm/loginDialog.js
@@ -638,15 +638,17 @@ const LoginDialog = new Lang.Class({
         this._userManager = AccountsService.UserManager.get_default()
         this._greeterClient = new Gdm.Client();
 
-        this._greeter = this._greeterClient.get_greeter_sync(null);
+        if (GLib.getenv('GDM_GREETER_TEST') != '1') {
+            this._greeter = this._greeterClient.get_greeter_sync(null);
 
-        this._greeter.connect('default-session-name-changed',
-                              Lang.bind(this, this._onDefaultSessionChanged));
+            this._greeter.connect('default-session-name-changed',
+                                  Lang.bind(this, this._onDefaultSessionChanged));
 
-        this._greeter.connect('session-opened',
-                              Lang.bind(this, this._onSessionOpened));
-        this._greeter.connect('timed-login-requested',
-                              Lang.bind(this, this._onTimedLoginRequested));
+            this._greeter.connect('session-opened',
+                                  Lang.bind(this, this._onSessionOpened));
+            this._greeter.connect('timed-login-requested',
+                                  Lang.bind(this, this._onTimedLoginRequested));
+        }
 
         this._userVerifier = new GdmUtil.ShellUserVerifier(this._greeterClient);
         this._userVerifier.connect('ask-question', Lang.bind(this, this._askQuestion));